Okay... forgive my gif not disposing of frames properly. If you open it up in an editor and look at each frame you'll see how its supposed to look. For the life of me I can't figure out WHY it is doing this.


( Can anyone help me with this?

)
I'll do one without transparency:

With explosions you need to have a sense of motion to the smoke. Think about the material expanding outwards and floating upwards. Also having the cloud go completely dark after being completely bright doesn't make sense, lighting-wise. If you want to do a flash, best to do it before the smoke clouds appear.

Also, don't be afraid to breathe a little colour into your backgrounds. You can still keep the contrast low with higher levels of saturation. This will make the scene more exciting. You just don't want to take it
too far or the readability goes out the window.
